Notes:

Begin a message with Attention.
Move smartly from one letter position to the next.
Do not send faster than your receiver can copy.
To send a double letter, pull flags in, then back out.
Between words use Interval.
Between sentences send Interval twice.
End a message with Interval three times.
To send digits, use Numerics, then use:

A for 1B for 2C for 3D for 4E for 5F for 6G for 7H for 8I for 9J for 0